Combined harrow and pulverizer.



C. SJOMAN.

COMBINED HARROW AND PULVERIZER.

APPLIUATION FILED MAY 13, 1911.

abbot/nu:

CAB-L SJOMAN, OF RAMSAY, MICHIGAN.

COMBINED HARROW AND PULVERIZER.

To all whom it may concern:

Be it known that I, CARL SJOMAN, a cit1- Zen of the United States,residing at Ramsay, in the county of Gogebic and State of Michigan, haveinvented certain new and useful Improvements in Combined IIarrows andPulverizers, of which the following is a specification, reference beinghad to the accompanying drawings.

My invention relates to new and useful improvements in harrows anddiggers and more particularly to a combined harrow and pulverizer, andmy object is to provide a device of this character in which there isprovided rigidly held and rotating ground treating implements.

A further object of the invent-ion resides in providing means to preventthe clogging of the rotating members and the carrying of trash and thelike in the operation thereof, and. a still further object resides inproviding combination teeth which are adapted to engage the soil andalso remove the clods and trash which are adapted to adhere to therotating members.

A still further object is to provide a simple and economical devicewhich will effectively carry out the purpose for which it is designed.

With these and other objects in view, my invention consists in the novelfeatures of construction, combination and arrangement of parts as willbe hereinafter referred to and more particularly pointed out in thespecification and claim.

In the accompanying drawing forming a part of this application, Figure 1is a top plan view thereof. Fig. 2 is a vertical longitudinal section asseen on line 22, Fig. 1, and Fig. 3 is a side elevation of one of thecombination teeth.

In carrying out my invention, I shall refer to the drawing in whichsimilar reference characters designate corresponding parts throughoutthe several views and in which 1 indicates a frame of the usual or anypreferred type used in such devices as harrows, in the forward end ofwhich there is rotatably mounted a shaft 2, and some distance to therear of the same, is rotatably mounted an additional shaft 3. Theseshafts are for the greater portion thereof square in cross section, butreduced and formed circular in cross section at the ends thereof so asto be rotatably mounted in bearings, and mounted on each of said shafts2 and 3, is a Specification of Letters Patent.

Application filed May 13, 1911.

Patented June 4, 1912.. Serial No. 626,893.

plurality of cutters or the like 4, said cutters being substantiallystar-shaped and the points 5 thereof forming substantial teeth. Thesestar-shape cutters 4 are provided with square openings to receive thesquared portion of the shafts and are held in spaced relation with oneanotherby means of the spacing sleeves 6, and thus it will be seen thatas the frame 1 is drawn forwardly, the teeth 5 of said cutters areadapted to engage the soil and rotate the shafts.

Securely and rigidly mounted in the bearings 7 on the frame 1, are theadditional shafts 8 and 9, said shafts being disposed, respectively, tothe rear of the shafts 2 and 3 and carried on said shafts 8 and 9, is aplurality of teeth 10, the purpose of which will be hereinafterdescribed. These teeth are combination teeth, being provided withdownwardly and forwardly projecting porti one which extend to a pointbelow the teeth 5 of the cutters 4 and are also provided with theforwardly or substantially horizontally disposed portions 12 whichextend to points adjacent the shafts 2 and 3 upon which the cutters 4are mounted. These teeth are rigidly mounted on the shafts 8 and 9 andare held in spaced relation with one another by means of the spacingsleeves 13 similar to the sleeve 6, said teeth being disposed instaggered relation with the cutters 4, so that the horizontallyprojecting portions 12 thereof extend on opposite sides or between saidcutters 4. In this manner, it will be seen that as the frame 1 is drawnforwardly, the portions 11 of the teeth 10 will dig the soil, the sameperforming the same functions as drag hook teeth, and the teeth 5 of thecutters 4, being above the effective ends of the portions 11, willengage the larger clods of earth to aid in digging and pulverizing thesame. It is a well known fact that in any rotating teeth, earth clods,trash and the like are adapted to adhere thereto, and in order toprevent the same from interfering with the operation of these rotatingmembers, the portions 12 of the combination teeth 10 are disposedadjacent the teeth of said cutters so as to clean the same of suchtrash.

Although I have not shown the same, it will be understood that anydesired means may be provided whereby a swingle or double-tree may beattached to the frame 1, so that draft may be applied.

From the foregoing, it will be seen that I have provided a combinedharrow and pulverizer in which there is used both stationary androtating cutters or teeth, and it will further be seen that thestationary teeth are additionally provided with means for the cleaningof the rotating teeth of the trash and the like, which are adapted toadhere thereto. Furthermore, it will be seen that by providingcombination teeth, such as above described, simplicity of construct-ionis gained as well as labor and expense saved. It will still further beseen that the device is of such simple construction as to be readily andcheaply manufactured, and one which is extremely effective in ope'ation.

It will be understood that various changes in form, proportion and inthe minor details of construction may be resorted to without sacrificingany of the principles of the invention.

What I claim is In a device of the class described, the combination witha frame, a pair of ro-tatably mounted shafts thereon, and star-shapedcutters carried on said shafts; of an addi tional pair of shaftsarranged in the rear of said mentioned shafts and rigidly mounted on theframe, a plurality of double pointed ground-treating teeth arranged onsaid last mentioned shafts, one of the points of said teeth beingdisposed below the cutters and the other between said cutters adapted toremove the trash therefrom.

In testimony whereof I hereunto afiiX my signature in the presence oftwo witnesses.

CARL SJ OMAN.

WVitnesses:

IRVING V. TWETTNER, LnvI S. RICE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

